It seems that Argos have been very quick off the mark and are already using the new-style PPI as shown below. Thanks to Dominic for this picture, received today.
UPDATE 6 July:
Three different examples seen today. The 1st and 2nd from with License number COVENTRY 909 are from the same mailing house for different customers. I though the square design had been abandoned by Royal Mail some time ago, but here it is with yet another Coventry license CV24385
Despite the fact that we are still waiting for the Charles Dickens stamps due next Tuesday, we are closing the office until the beginning of July to take a well-earned rest and recharge the batteries.
Orders through our shop (www.norphil.co.uk/catalog) will be processed and stock reserved as usual. There will be a special bonus for order number 2000.
And we may accidentally see emails while I'm using the iPhone looking for ideal places to rest and eat. Enjoy the summer and the rest of Euro2012 !